(def x 1)
(def y 5)

(def foo
     (# (y)
        (def z 3)
        (console.log x y z)))

(def z 7)

(foo 2)
(console.log x y z)

(def bar
     (# (x)
        ;; when and let are implemented using functions but don't create a new
        ;; scopes for the purpose of var/def
        (let () (var y 2))
        (when (= x "yes")
          (var y 3))
        (+ y 2)))

(console.log (bar "no") (bar "yes"))

(console.log ((# (a b c)
                 (var x a) (var y b) (var z c)
                 (+ x y z))
              9 8 7))


((# ()
    (var x 10)
    ((# ()
        (var y 20)
        ((# ()
            (var z 30)
            (console.log x y z)))))))